Cutting is a very destructive act, and while your working on stopping it, make sure that the equipment you use is sterile otherwise infection might occur.
Please! Don't blame yourself for how you feel, self-harm is an expression of your feelings and you can't help how you feel. It's a good idea to keep a diary, emotions can be difficult to deal with and it is helpful to record how you cope with and channel these, record everything you feel and do, and if and when you get help your diary will come in useful. Find a good friend who you trust. Let them read what you write in your diary. Sometimes if you were flashing you won't remember anything you wrote. Don't worry. It will all make sence in the end! =)
Try drawing or painting how you feel, some people draw on themselves using bright body colours Line up some cushions to represent people who caused you pain,Put their names on the pillows with tape and paper. Tell them how they hurt you and that you no longer deserve punishment, kicking or hitting the cushions is good, a great way to vent excess emotions. Yell as much as you need to. Let out all your frustrations on them! Also a punching bag is good to let out anger. You can be as destructive as you want with one of those. LET IT ALL OUT!